| Modification mechanism of hypereutectic Al-Si alloy with P-Na addition |
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| 引用本文： | 吴树森,涂小林,福田葉椰,菅野利猛,中江秀雄. Modification mechanism of hypereutectic Al-Si alloy with P-Na addition[J]. 中国有色金属学会会刊, 2003, 13(6) |
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| 作者姓名： | 吴树森 涂小林 福田葉椰 菅野利猛 中江秀雄 |
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| 作者单位： | State Key Laboratory of Mould and Dies Technology，State Key Laboratory of Mould and Dies Technology，Kimura Foundry Co Ltd，Kimura Foundry Co Ltd，Department of Materials Science and Engineering Huazhong University of Science and Technology，Wuhan 430074，China，Huazhong University of Science and Technology，Wuhan 430074，China，Shizuoka 411，Japan，Shizuoka 411，Japan，Waseda University，Tokyo 169，Japan |
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| 摘 要： | 1 INTRODUCTIONAsastructuralmaterialhavingmanymeritssuchashighfrictionresistance ,highheatresistanceandlowexpansioncoefficient[13] ,hypereutecticAl Sial loyhasbeenattractingattentionofmanyresearchers .However ,forthehypereutecticAl Sialloysproducedwithtraditionalcasting process ,thereareusuallymanycoarseSiparticlesinthematrix ,whichleadtolowtensilestrength ,poorturning propertiesandroughsurfaceaftermechanicalworking[4 ] .Thepre viousresearches[5,6 ] indicatedthat ,forparticulatere inforc…
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Modification mechanism of hypereutectic Al-Si alloy with P-Na addition |
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| WU Shu-sen TU Xiao-lin,Y. Fukuda,T. Kanno,H. Nakae. Modification mechanism of hypereutectic Al-Si alloy with P-Na addition[J]. Transactions of Nonferrous Metals Society of China, 2003, 13(6) |
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| Authors: | WU Shu-sen TU Xiao-lin Y. Fukuda T. Kanno H. Nakae |
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| Affiliation: | WU Shu-sen1 TU Xiao-lin1,Y. Fukuda2,T. Kanno2,H. Nakae3 |
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| Abstract: | Effect of P-Na united modification on Al-22%Si-1.0%Cu-0.5%Mg-0.5%Mn alloy was studied. The results show that the refining effect of P-Na addition on primary silicon is superior to that of P and the former could modify eutectic silicon at the same time. Effects of P-Na modification on crystallization and microstructure of hypereutectic Al-Si alloys were studied with Electron-Scanning Microscope, Electron-Probe and X-ray diffractometer. The modification mechanism represents that on one hand, the primary silicon is refined by AlP as heterogeneous nucleus; on the other hand, when Na is added at the same time, P atoms are difficult to diffuse in the melt, and then enrichs on the growing faces of silicon phase. Moreover, a SiP compound was also discovered in Si crystals, which prevents the growth of silicon phase and refines the primary silicon. |
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| Keywords: | hypereutectic Al-Si alloys modification mechanism grain refinement modification |
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